it says i have to drill a 1/4 inch hole in this enclosure in order for it to meet the requirements of nema 3 r. should i drill a hole in it? it is regularly exposed to washdown environments.
http://www.nema.org/prod/be/enclosures/upload/NEMA_Enclosure_Types.pdf
I know that NEMA standards are not, since they neither test nor certify any products, and I’m assuming that the IEC’s IP Standards are the same way, but I just want to be sure.
Standards are simply agreements on common terms.
The question of whether adherence to a standard is mandatory depends on the legal jurisdiction in which the installation takes place. It is possible that the "Authority Having Jurisdiction" (that’s the generic term for the electrical inspection agency that determines what is acceptable in your area) may require compliance with certain standards.
It’s an italian motor, so it’s hard starting. Any recommendations on breaker/enclosure combo? Nema 3r prefered.
from 2008 NEC
430.52 time delay fuse of not more than 175% fla or inverse time breaker of not more than 250% of fla.
any of the major manufacturers can help you out with the enclosure.
hi
i m working on my corn mill and my corn mill need new electric or diesel motor with 15 hp. i need to calculate the heat output of a 15 HP motor and then use that data to determine the heat radiated at(btw grinding unit and motor at different distances);
1 inch away
2 inches away
3 inches away
…uptil 6 inches away.
the motor info is :
Baldor JPM2333T 15HP 1755RPM 3 PHASE 60HZ 254JP 0748M TEFC F MOTOR
Catalog Number: JPM2333T
Specification Number: 07H301X798
Horsepower: 15
Voltage: 208-230/460
Hertz: 60
Phase: 3
Full Load Amps: 41-37.8/18.9
Usable at 208 Volts: N/A
RPM: 1755
Frame Size: 254JP
Service Factor: 1.15
Rating: 40C AMB-CONT
Locked Rotor Code: J
NEMA Design Code: A
Insulation Class: F
Full Load Efficiency: 89.5
Power Factor: 82
Enclosure: TEFC
Baldor Type: 0748M
DE Bearing: 6309
ODE Bearing: 6307
Electrical Specification Number: 07WGX798
Mechanical Specification Number: 07H301
Base: RG
Mounting: F1
i need help like how to calculate and which eqn i have to use it.
really need help please please.
thanks
The rated mechanical output of the motor is 15 Hp or 15 X 746 = 11190 watts.
The nameplate efficiency is 89.5% or 0.895.
Using losses = output power X (1-efficiency) / efficiency), the losses are 11190 X (1-.895) / 0.895 = 1313 watts.
The motor’s nameplate rated ambient temperature is 40C. The performance information on the Baldor web site indicates that the typical temperature rise of the windings at full load is 80C. The motor’s surface temperature would be considerably less that the winding temperature, but assume that the surface temperature is 120C or 393K.
The radiated heat in watts can be calculated using q(W) = rT^4Ae, where r is the Steffan-Boltzman constant = 5.67E-8, T is the Kelvin temperature, A is the surface area in m^2 and e is the emissivity. The surface area can be estimated at 0.6 m^2 from the drawing provided on the Baldor web site. The emissivity of gray painted steel can be estimated to be 0.9. The maximum radiated heat can then be calculated to be 730 watts. The remaining 583 watts can be presumed to be transferred to the air by direct conduction. The radiated energy would also be absorbed by the air if not transferred to a fairly close object.
Obviously the heat dissipated by a diesel engine would be considerably more since the efficiency is only about 30%. However, quite a bit of the heat could be carried out of the area by piping the cooling water to a remote radiator.
Revision:
A small diesel engine is going to be a lot less efficient than 30%. I think 15% may be more likely.
I get them at my local electrical supply store. They usually sell to contractors, and hardware stores, so you could get one by asking your locale hardware store to get one for you, or the outlet may sell one to you. Look in the yellow pages under electric equipment & supplies. Give them a call and ask them if you can buy one from them, or what local store would have them.
Designed to accommodate a large variety of commercial plasma displays ranging from 24″ (61cm) to 70″ (178cm) and housing additional VESA mounts for thin client or dedicated PCs as standard an Armagard plasma enclosure is the ideal all in one digital signage protection solution.
Armagard plasma enclosures are constructed according to European IP and International NEMA standards, ensuring protection from water and dust. Built from mild or stainless steel with a shatterproof screen Armagard plasma enclosures are shipped complete with wall mounting brackets but may also be ceiling or pedestal mounted.
Duration : 0:1:29
Designed to accommodate a large variety of commercial LCD displays ranging from 24″ (61cm) to 70″ (178cm) and housing additional VESA mounts for thin client or dedicated PCs as standard an Armagard LCD enclosure is the ideal all in one digital signage protection solution.
Armagard LCD enclosures are constructed according to European IP and International NEMA standards, ensuring protection from water and dust. Built from mild or stainless steel with a shatterproof screen Armagard LCD enclosures are shipped complete with wall mounting brackets but may also be ceiling or pedestal mounted.
Duration : 0:1:12
Designed to accommodate a large variety of commercial plasma displays ranging from 24″ (61cm) to 70″ (178cm) and housing additional VESA mounts for thin client or dedicated PCs as standard an Armagard plasma enclosure is the ideal all in one digital signage protection solution.
Armagard plasma enclosures are constructed according to European IP and International NEMA standards, ensuring protection from water and dust. Built from mild or stainless steel with a shatterproof screen Armagard plasma enclosures are shipped complete with wall mounting brackets but may also be ceiling or pedestal mounted.
Duration : 0:1:14
K790 is Water and Dust Resistant Model.
K790 series is an advanced metal Panel PC. Its ultra slim and exquisite metal enclosure catches most eye contacts. K790 series includes four different display sizes, 12″, 15″, 17″ and 19″ equipped with high brightness TFT panel and resistive / SAW / IR touch. NEMA 4 / IP 65 dust and water proof display front meets industrial application requirements.
Beside standard model, K790 series also derivate multiple different cabinet designs such as whole color painted sheet metal housing, complete stainless steel cabinet and panel mount model. Fanless and ventless or vandal proof design are also provided. For fitting different applications, K790 series designs with desktop stand, MSR, laser scanner and camera kits.
K790 series comprehensive product line is the best choice for digital signage, kiosk, e-home, KVS, healthcare, industrial automation, transportation, gaming and other applications.
Duration : 0:1:25
ZONEX® Enclosures are designed and certified to meet ATEX Directive 94/9/EC for hazardous locations and safely house electrical and electronic devices in EEx e Zone 1- and Zone 2-rated increased safety applications.
Hoffmans ATEX EEx e enclosures are not intended for use in explosion-proof or flame-proof applications.
Features
• Easy-to-use Type 316 stainless steel quarter-turn door latching
• 3-mm double-bit insert for security
• Slot and through-hole side-mount hanging brackets
• Lift-off door hinges
• Removable gland plates; one or three gland plates standard
Specifications
• Fabricated from Type 316 stainless steel
• Type 316 stainless steel external fasteners
• Gray silicone high-temperature gasket on doors and gland plates
• Internal/external brass earth/ground provision
Finish
#3 brushed finish
Industry Standards
ATEX Directive 94/9/EC
II 2 GD EEx e II, IP66
EN 60079-0: 2004
EN 60079-7: 2003
EN 50281-1-1: 1999
EN-50281-1-2: 1999
Certificate No. ITS06ATEX35438U
UL 508A Listed; Type 4, 4X, 12; File No. E61997
cUL C22.2 No. 94 Listed; Type 4, 4X, 12; File No. E61997
NEMA/EEMAC Type 4, 4X, 12
IEC 60529, IP66
Duration : 0:1:33